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Publications (4)7.11 Total impact

  • Source
    Linghang Fan, Hongfei Du, Upendra Mudugamuwa, B.G. Evans
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    ABSTRACT: The design of efficient packet scheduling algorithms, which play a key role in the radio resource management (RRM), is crucial for the multimedia delivery in the satellite digital multimedia broadcasting (SDMB) system. In this paper, a novel packet scheduling scheme, which uses the cross-layer approach in its design, is proposed. This scheme comprises a new service prioritization algorithm and a dynamic rate matching based resource allocation algorithm, aimed at utilizing both the applications' QoS attributes and the physical layer data rate information. The performance of the proposed scheme has been evaluated via simulation. In comparison with existing schemes, the proposed scheme achieves significant performance gain on delay, delay variation and physical channel utilization.
    IEEE Transactions on Broadcasting 01/2009; · 2.65 Impact Factor
  • Source
    Hongfei Du, Linghang Fan, Upendra Mudugamuwa, B.G. Evans
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    ABSTRACT: In recent years, multimedia content broadcasting via satellite has attracted increased attention. The satellite digital multimedia broadcasting (S-DMB) system has emerged as one of the most promising alternatives for the efficient delivery of multimedia broadcast multicast service (MBMS). The design of an efficient radio resource management (RRM) strategy, especially the packet scheduling scheme, becomes a key technique for provisioning multimedia services at required quality of service (QoS) in S-DMB. In this article, we propose a novel cross-layer packet scheduling scheme that consists of a combined delay and rate differentiation (CDRD) service prioritization algorithm and a dynamic rate matching (DRM)-based resource allocation algorithm. The proposed scheme considers multiple key factors that span from the application layer to the physical layer, aiming at simultaneously guaranteeing diverse QoS while utilizing radio resources efficiently under the system power and resource constraints. Simulation results demonstrate that the proposed cross-layer scheme achieves significantly better performance than existing schemes in queuing delay, jitter, and channel utilization.
    IEEE Communications Magazine 09/2007; · 4.46 Impact Factor
  • Linghang Fan, Hongfei Du, Upendra Mudugamuwa, Barry G. Evans
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    ABSTRACT: The design of efficient radio resource management (RRM) is crucial for the multimedia content delivery in the satellite digital multimedia broadcasting (SDMB) system. In this paper, a novel packet scheduling scheme with a new power allocation algorithm has been proposed, and its performance has been evaluated via simulations. In comparison with existing schemes, the proposed strategy achieves significant performance improvement, especially on delay and jitter. Nomenclature i α = QoS class factor ) (n i δ = the delay serving index at current time slot n for queue i i = Queue id n = the number of time slot d N = the number of packets that have been served and left the queue before this TTI q N = the number of packets that currently in the queue
    06/2006;
  • Hongfei Du, Linghang Fan, Upendra Mudugamuwa, Barry G Evans
    [Show abstract] [Hide abstract]
    ABSTRACT: In recent years, multimedia content broadcasting via satellite has attracted increased attention. The satellite digital multimedia broadcasting (S-DMB) system has emerged as one of the most promising alternatives for the efficient delivery of multimedia broadcast multicast service (MBMS). The design of an efficient radio resource management (RRM) strategy, especially the packet scheduling scheme, becomes a key technique for provisioning multimedia services at required quality of service (QoS) in S-DMB. In this article, we propose a novel cross-layer packet scheduling scheme that consists of a combined delay and rate differentiation (CDRD) service prioritization algorithm and a dynamic rate matching (DRM)-based resource allocation algorithm. The proposed scheme considers multiple key factors that span from the application layer to the physical layer, aiming at simultaneously guaranteeing diverse QoS while utilizing radio resources efficiently under the system power and resource constraints. Simulation results demonstrate that the proposed cross-layer scheme achieves significantly better performance than existing schemes in queuing delay, jitter, and channel utilization.
    Environmental Fluids.